According to Red Hat, there aren't enough Itanium-based servers being sold to justify continuing to support the platform, so as of Enterprise Linux 6, Intel's Itanium processor will no longer be supported.
Chris Ingle, research director fo IDC's European Systems Group, says the decision makes perfect economical sense for Red Hat. Ingle points out that it would be hard for Red Hat to pour resources into supporting a version of Enterprise Linux for Itanium, and that it makes more sense to focus on support for x86-based servers.
Red Hat said it will still offer support for Enterprise Linux version 5 on Itanium-based servers until March 2014, and will add new features to version 5 on Itanium and support new hardware in accordance with its standard product lifecycle policy. In addition, some OEMs will offer extended support for version 5 on Itanium until March of 2017, and could also choose to support version 6 on their own.